I am only 6 months into my own journey, but one of the things that has helped me is to develop other, healthy habits that make it hard to even contemplate drinking. I've started running again, training up to about 35 miles a week, eating the right things to support that and getting lots of good sleep as a result. I'm back to rock climbing too, when I have time and the weather cooperates, which it isn't today.
Is there a hobby or an interest that you could really jump into during this break before you start your new job? Always wanted to learn to scuba dive? Take up painting? Train for a triathalon? Certify your dog as an assistance animal and take him/her to hospitals to visit sick kids (you could dress as Santa to top it off)? Bake everyone you know homemade Christmas cookies?
I have no idea what kind of things you like to do, but I am sure there's something on your bucket list that you could cross off with a few weeks of time on your hands.
Good luck to you!